Method and apparatus for transmitting/recording computer-generated displays on an information channel having only audio bandwidth
First Claim
1. Apparatus for transmitting a computer-generated image together with an audio signal, comprising:
- audio signal generating means adapted for receiving an aural input and converting said aural input into electrical audio signals indicative thereof;
computer means for generating first display codes from which said computer-generated image may be derived;
first conversion means for receiving said first display codes and converting each said display code into an electrical audio tone signals indicative of said each first display codes; and
transmission means, coupled to said audio signal generating means and to said first conversion means and having first and second channels of an audio bandwidth, for simultaneously transmitting said audio signals on said first channel and said audio tone signals on said second channel.
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Abstract
A method and apparatus for transmitting/recording a computer-generated display simultaneously with the transmission of audio and/or video signals. A computer generates a series of codes from which an image may be derived, the resolution of which is not dependent on the recording/transmission medium. These codes are supplied to a first modem through a standard RS 232 communications line. The first modem converts these codes into image-bearing audio tones. The audio tones are input in the left audio channel of a video tape recorder. Simultaneously, aural information is picked up by a microphone and input into the right audio channel of the video tape recorder. Also simultaneously, a video camera provides video signals to the video channel of the video tape recorder. After recording these signals on a video tape, the tape is transported to a second video tape recorder where it is played back. On playback, the audio tone signals from the left audio channel of the video tape recorder are provided to a second modem. The second modem reconverts the audio tone signals into computer codes which are provided to a computer monitor which generates and then displays the image generated by the computer with a resolution dependent only upon the monitor. Also on playback, the audio signals from the right audio channel of the video tape recorder are provided to a speaker. Also on playback the video signals recorded on the video channel of the video tape are played back and provided to a standard television for display.
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Citations
43 Claims
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1. Apparatus for transmitting a computer-generated image together with an audio signal, comprising:
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audio signal generating means adapted for receiving an aural input and converting said aural input into electrical audio signals indicative thereof; computer means for generating first display codes from which said computer-generated image may be derived; first conversion means for receiving said first display codes and converting each said display code into an electrical audio tone signals indicative of said each first display codes; and transmission means, coupled to said audio signal generating means and to said first conversion means and having first and second channels of an audio bandwidth, for simultaneously transmitting said audio signals on said first channel and said audio tone signals on said second channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. Apparatus for transmitting a computergenerated image, comprising:
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computer means for generating first display codes containing information from which said image may be derived; first modem means for receiving said first display codes and coverting said first display codes into audio tones indicative thereof; a recording medium having first and second channels of an audio bandwidth; recording means for recording said audio tones on said recording medium first audio channel. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. An apparatus for transmitting computer-generated image signals comprising:
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a first modem connected to receive said computer-generated signals and convert them into audio tones; a video recorder having at least one audio bandwidth channel, for recording said audio tones through said audio channel; and a video storage medium, coupled to said video recorder, for storing the recorded audio tones. - View Dependent Claims (21, 22)
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23. A method of transmitting computer-generated image signals, comprising the steps of:
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generating a signal which is intended to be in synchronism with said computer-generated image signals; converting said computer-generated image signals into audio tones indicative of said computer generated image; and simultaneously recording said audio tone using an audio bandwidth channel of a video recorder and said signal using another channel of said video recorder, onto a video storage medium. - View Dependent Claims (24)
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25. A method of transmitting a computer-generated image comprising the steps of:
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generating, with a computer, first display codes containing information from which said image may be derived; converting each of said first display codes into audio bandwidth tones indicative thereof; and recording said audio tones on an audio channel of a storage medium. - View Dependent Claims (26, 27, 28, 29, 30)
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31. A method for transmitting a computer-generated image together with an audio signal, comprising the steps of:
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receiving aural input and converting it into electrical audio signals; generating, with a computer, first codes from which said image may be derived; converting said first codes into electrical audio tone signals; and simultaneously transmitting said audio signals and said audio tone signals on first and second audio bandwidth channels, respectively. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. An apparatus for recording an informational session in synchronism with images on a computer display, comprising:
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means for receiving said informational session, and for encoding said informational session into a form which can be recorded on a recording medium; a computer for performing processing operations of a type related to said information session and for creating first display codes indicative of characters to be displayed on the screen of said computer; a modem, coupled to said computer to receive said first display codes to produce audio signals indicative of said first display codes; and multi-channel recording means, coupled to simultaneously receive said encoded informational session information on one channel thereof and said encoded display codes on another channel thereof, for recording said information on respective channels on the recording medium. - View Dependent Claims (42, 43)
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Specification